Biology Exploring Study Set 1

Biology

Quiz 46 :

Muscles, Skeletons, and Body Movements

Quiz 46 :

Muscles, Skeletons, and Body Movements

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What is the name of the cylindrical contractile elements that are about 1 mm in diameter and which individual skeletal muscle cells are packed with?
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C

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What are the Z lines in skeletal muscles composed of?
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B

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How deep may loons dive while foraging?
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C

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How many skeletal muscles are in a typical human body?
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What action causes the shape change in the myosin crossbridge that directly triggers the power stroke in skeletal muscle contraction?
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Which of the following is a system of vesicles that wraps around each A band and I band, and stores ions that are used in muscle contractions?
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In a skeletal muscle contraction, which of the following undergoes a conformational change when it binds to a specific ion and then uncovers the crossbridge binding site by causing another factor to be moved to the grooves in the actin double helix?
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In which ion would a defect in transport have the most direct effect on muscle contraction?
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What are the H zones in skeletal muscles composed of?
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In a skeletal muscle contraction, which of the following acts to allow the crossbridge cycle to occur when it flows into the cytosol through open ion channels?
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What is the name of the cords of connective tissues that connect skeletal muscles to bones?
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How many nuclei do skeletal muscle cells have, and what controls them?
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What is the region between two adjacent Z lines?
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What are the I bands in skeletal muscles composed of?
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Which muscle type is found in the walls of body tubes and the cavities of vertebrates, such as blood vessels and the intestines?
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What are the A bands in skeletal muscle composed of?
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What is the diameter of muscle fibres?
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In a skeletal muscle contraction, which neurotransmitter is released at the axon terminal to trigger an action potential in the muscle cell?
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In a skeletal muscle contraction, what must be moved to the grooves in the actin double helix to uncover the crossbridge binding site?
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Which molecules compose parallel bundles of thick filaments?
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